This bilingual vocabulary (with approximately 3000 entries) includes many of the most common words in the Tetelcingo Náhuatl (Mexicano, Mösiehuali) language (Morelos, Mexico). The entries in both the Spanish–Náhuatl and Náhuatl–Spanish sections include translation equivalents with different senses and subentries for derived forms. Following the body of the vocabulary, there are notes about the grammar.